Instanced Subobjects on Children BPs point to Parent BP's instance if both are loaded when creating the object

The Instanced Subobject values for the Child_BP are same as what the Parent_BP subobject values are changed to before compile and saving both Blueprint Objects.

Tested in 4.18.3 (CL-3832480), 4.19.2 (CL-4033788), 4.20 (CL-4165543) and 4.21 (CL-4162595)

1. Create a Basic C++ project
2. Create a C++ class that derives from UObject named ObjectWithSubobject
3. Enter the following code in the ObjectWithSubobject header file:

   UCLASS(EditInlineNew, DefaultToInstanced)
   class SUBOBJECTINDIRECTION_API USubObject : public UObject
   {
   GENERATED_BODY()
   
   public:
   UPROPERTY(EditAnywhere)
   FString String;
   
   
   };
   
   
   UCLASS(Blueprintable)
   class SUBOBJECTINDIRECTION_API UObjectWithSubObject : public UObject
   {
   GENERATED_BODY()
   
   public:
   UPROPERTY(EditAnywhere, Instanced)
   USubObject* SubObject;
   
   };
   

      4. Create a blueprint deriving from the ObjectWithSubobject named Parent_BP

      5. Create a child blueprint from Parent_BP named Child_BP

      6. Set the Subobject property in the Parent_BP to Subobject

Expand the Subobject property and input "Parent" the String property

Expand the Subobject property in the Child_BP blueprint

Expected: The Child_BP should have default values.

Result: The Child_BP values has the same values that the Parent_BP has been changed to.